1 (6 oz.) can limeade concentrate (defrosted)
1 (14 oz.) can sweetened condensed milk
1 c. sour cream
8 oz. (2 c.) nondairy whipped topping
2 to 3 green food coloring
1 (8 inch) chocolate crumb pie crust

Combine undiluted limeade, condensed milk and sour cream; stir until well blended. Fold in topping with food coloring. Mixture should be thick and mound when dropped from a spoon. Spoon into prepared crust. Garnish with chocolate chips. Chill until set, about 3 hours.